Pump



W. R. DE MORE PUMP I Filed Jan. 18. 1924 Z Sheets-Sheet 1 WITNESSESW253. Dex/am;

V I ATTORNEYS Patented Nov. 18, 1924.

outrun srarss WILLIAM RICHARD DE MORE, OF JACKSONVILLE. FLORIDA.

PUMP.

Application filedrJanuary 18, 1924. Serial No 687,071.

To all whom it may concern: I

Be it known that I, WILLIAM RICHARD DE Moan, a citizen of the UnitedStates, and a resident of Jacksonville, in the county of Duval and Stateof Florida, have invented certain new and useful Improvements in Pumps,of which the following'is a specification.

This invention relates to pumps and is more particularly directed to a.device for inflating tires.

An object of the invention is the provision oi a pneumatic pump whichhas a direct stroke and complementary leverage stroke whereby a greaterdegree of pneumatic pressure may be had.

A further object of the invention is the provision of a pneumatic pumpfor inflating tires which will eliminate lost motion in the first partof the stroke of the pump this portion of the. stroke being a directdrive until the resistance becomes too great for ordinary strength andthen a lever is operated to complete the stroke so that an ordinaryperson may compress three or four times the amount of air withapproximately the effort required in the ordinary pumps.

7 A still further object of the invention is the provision of a pumpwhich will supply air under pressure throughout the full movement of theplunger and whereby substantially no air will remain in the cylinder ofthe pump when the stroke has been completed.

This invention will be best understood from a consideration of thefollowing detailed description, in view of the accompanying drawingforming a part of the specification; nevertheless it is to be understoodthat the invention is not confined to the disclosure, being susceptibleof such changes and modifications which shall define no materialdeparture from the salient features of the invention as expressed in theappended claims.

In the drawings:

Figural is a vertical section of a pump constructed according to myinvention.

Figure 2 is a fragmentar 1 plan view of the same.

Figure 3 is a horizontal section taken along the line 33 of Figure 4.

Figure 4 is a vertical section taken along the line H of Figure 3.

'Figure 5 is a vertical section similar to Figure 1, showing the pawldisengaged from the plunger rod V Figure 6 is a view iniperspective of aspring retaining means for the operating levers of the pump. a V

Figure 7 is a view in perspective of the loosepivotal connection for theoperating levers with parts located in disengaged relation. i

Referring more particularly to the drawings, 1 designates a base memberhaving an upstanding annular flange 2. adaptedtoreceive the lower endofa pump cylinder 3.,

The upper end of the cylinder is closed by a cap 4.

Mounted for reciprocation Within the cylinder3 is a plunger 5. 'Theplunger comprises a pair of plates 6 and 7 havingsecured therebetween aflexible gasket 8 which is usual in pumps. The plates and gasket arelocked in rigid relation by means of nuts located upon opposite sides ofthe plates 6 and 7 and having threaded engagement with the lower ends ofthe rods 9 and 10. The rods are movable through perforations in the cap4.

Coil springs 11 surrounding the lower ends of the rods 9 and 10 havetheir lower endsin engagement with the securing nuts upon the innerplate 7 and their upper ends engaged by the perforated lateralextensions 1201? the U-shaped bracket 13. The rods 9 and 10 pass throughtheperforations in the lateral extensions 12, with the extensions beingslidable on said rods.

A centrally disposed rod 14 passes through a central perforation in thecap 4 and pro jects beyond the cap and has its one end locked by meansof nuts to the bridging portion of the U-shaped member 18. AVco-ilspring 15 surrounds the lower end of rod 14, and is secured to the rodat its upper end and has its lower end abutting the U- shaped member13'. 1

The inner wall of the base 1 is provided with sockets 16 adaptedtoreceive the nuts 17 on the rods 9 and 10 and the base member islikewise provided with an annular groove 18 to receive the dependingflange of the gasket 8 so that when the piston is placed in itslowermost position the nuts 17 will fit in the pockets 16 and thedepending flange on the, gasket 8 will fit into the annular groove 18and thereby permit the plunger to contact with the-inner wall of thebase member 1.

A sliding cross head 19 is rigidly conuected with the upper end isprovided with arcuately shaped end grooves engageable withtherods 9-and; whereby the cross head will be adapted to slidebetween the rods 9.and 10 andlbe. guided thereby. A lover. 20-is pi'votally: con nectedbyzmeansof the link 21 to the cross head 19::wflhile a lever 22 ispivotallyv connected by means of alinka23' to the cross head. The.leversare providedw'ith hand grips 2 luat= their. outer. ends wherebythe same may be operated. Ablock .25 is rigidlyconnected? tothe. upper;ends ofthe rods ands 10 and. has its ends upturned: as shownz1at26. andprovided. with slots 27 adapted to receive a bolt 28 mounted in the.perforationszin; theibars 29 which cooperate to support thelevers20 and.22. The: engagement-oi'ithebolts 28 .in the slots 27 provides.a:..'t'ulcr:u1n for the operation of the lovers.

In order to prevent the bolts 28 from be ing. displaced from. the slots27' when the handlesor: levers 20 and;22 are operated I providea=locking member 30 having a depending arm. 31 and perforated ears 32which receive the bolt 28: The depending armrfil iS provided with a lug33 which. is adaptedto engages beneath the outer projeetin-g; ends ottheblook 25, as shown in Figured. The flat portions 3%. of the mem hers30-aareiadaptedto engage at the rear of the upstanding portions 26 atthe ends of the block: 25 and prevent outward movement. of the. lookingmember- 30. Whenit isdesired to. release the handles-orlevers 20 and. 22from the fulcruming slots 27 the armsr3'1; due to their resilience, areforced laterally. outward to-v remove the lugs 33 from beneath the block25 wherebythe lower endsofsaidarms may be oscillated inwlardly andcausethe flat portions 3+l to be swung to.a.-.position above-'- the topsof the upstanding portions 26. Byexerting a lat-. eral pull on thelevers 20 and 22 the bolts it-l: are. disengaged from the slots 27.

Therods 9 and10 are: provided with a plurality of spacednotches 05adapted to be engaged? by. pawls 36 inorder to lock; the rodsaagainstupward movement at certain. times during the upward movement of thelevers20 and 22.

The: rod: 1 1 is provided with notches 37 adapted to-be engaged bya-pawl38 r'or pre venting upward: :movement 1 at certain times, ot saidrod. These: three pawlsarepivotally mounted on a rod 39 which is mountedof the rod let and.

in bearings formed on the ends of plates 40 secured to the inner face ofcap l. A U- shaped bracket ll supports the outer ends of. the pawls andis forced,- u-pwardly by means of a spring42 whereby the paw-1s aremaintained out of engagement with the notches in the rods 9, 10 and 141.The U- shaped bracket 41 is pivotally mounted on the rod 39.

An actuating rod 4:3 is mounted for sliding movement. in brackets a l.A. spring 15 between, the lower bracket 14: and a nut or enlargement 16on the end-of the rod is adapted to, maintain: the-rod depressed-:01 inits lowermostposition- A? lever 47 piv otallyi mounted at d8 has itsinner end-.101 c-ated beneath thenut onatherodl?) so that when, theouter end of lever L7. is depressed the rod will be elevated.v The upperend of the rod is provided with a Uslraped member withthe endhO- passingthrough a perforation in the. cap land adapted to engage one end of thebracket tl: and force said, bracket downwardly against thetension ofthespring 12 and permitthe pawls to fall into engagement with theirrespective notches in the rods 9, 10 and ltand prevent upward movementot'jtherods when the levers 20 and 22 are elevated. An elongated :boss51 dependingfrom the. inner face of :cap i .is provided with passages inwhich. the rods 9, 10 and 14 are slidable, the boss forming a bearing;for the upper ends of the rods.

When the arms 20 and 22. have been moved laterally outwardcausing thebolts 28 to become disengagedfromtheslots 27, the arms may. bepositioned longitudinally oi? the cylinder- 3 and locked. againstdisplacement bya spring member 52..v

The spring member is provided. with hooks 53 :at its outer, end whichengage the hand grips 2 1' and maintain; the grips, adjacent .the outerwall of thecylinder B. The substantially annularw central portion of thespring member 52 embraces the cylinder 3.

it will-be noted-from Figures dand: 5 that the portion 5d of pawl38isshaped slightly ditt'erent from the portion 55. of: the pawls 3 sothat the pawl 38- willenga-ge its respective. notches in the rod 1' 1more readily that the pawls36 will engage their-respee tivenotches intherods 9-.and'10.

The operation of my, device is as =follows 2 In the normal operation ofthe-pump the outer end gofthe lever, 47 is depressed thereby elevatingthe rod 43 and causing the member on the upper-end of the rod to beraised from, the, Ui shaped' bracket 4-1 thereby: permitting the-spring12. to elevate saidv bracket and'likewise the. threepawls out ofengagement with the notches-0t the three rods19., 1.0.and 1.4.Bypulling; upon the handles 24:, the plungertogethers withthe threerods, are simultaneously elevated.

thepawls will engaged the notches in their- Pressing upon the handles24: downwardly will cause a simultaneous lowering of the three rods andthe piston 5. The down stroke is continued until the downward movementis ,sufiicient to become laborious to the operator of the pump. At thistime the lever 47 is released permitting the rod 43 to descend andthereby causing member to be moved downwardly and lower the bracket 41against the tension of spring 42 so that respective rods. An upward pullis exerted on the handles 24; when the pawls 36 engaging the notches 35will prevent upward movement of the rods 9 and 10, and since the levers20 and 22 are rocked on their a. in

pivots 28 the cross head 19 will be depressed through the links 21 and23. This causes the lower end of rod 14 to be depressed,

carrying U-shaped member 18, and the lateral extensions 12 downwardly,and compressing springs 11'.

As soon as the cross head has moved down to its normal position by theupward pull of the handles 24, the handles are depressed forcing rods 9and 10 downwardly while rod 14 is maintained stationary since it isengaged by pawl 38. When rods 9 and 10 are lowered piston 5 is alsolowered thus connpleting the stroke ofthe pump, and since piston 5 isadapted to contact with the inner surface of the base of the pump allthe air is forced out of cylinder 3.

The release of lever 47 raises the pawls from their respective notchesso that the piston 5 and rods 9, 10 and 14 may be elevated "freely.

Rods 9 and 10 are devoid of notches at points where the acting ends ofthe pawls are in engagement with said rods when the rods are at the endof their stroke. The upper notch on each rod 9 and 10 being locatedbelow the pawls when the rods are fully depressed.

Ratchet 38 by reason of the difierence in,

its construction over that of ratchets 36 will become disengaged whileratchets 36 are still engaged.

lVhat I claim is:

1. A pump comprising a cylinder, a piston, a plurality of rods connectedwith the piston, a plurality oflevers forming handles tor directreciprocation of the piston for a portion. of the stroke of said piston,fulcrums for the levers,'and means causing one of the rods to remainstationary when the levers are rocked on the fulcrums and for permittingreciprocation of the other rods to complete the stroke of the piston.-

2. A pump comprising a piston, a. plurality of rods connected with thepiston, a plurality of levers forming operating handles for directrecipocation of the piston for a portion of the stroke of the piston,means connecting a pair of the rods rigidly together and provided withfulcrums forming a pivotal support for'the operating levers,

levers are rocked on their pivot points for completing the stroke of thepiston through thepairs of rigidly connected rods.

3. A pump comprising a piston, a plurality of rods connected with thepiston, a plurality for direct reciprocation of the piston for a portionof the stroke of the piston, means connectin a gether and provided with:tulcrums forming a pivotal support for the operating levers, resilientmeans connecting the pair of rods with the other rod, and means formaintain ing the last mentioned rod against movement whereby the leversare rocked on their pivot points for completing the stroke of the pistonthrough the pairs or" rigidly connecting rods, said resilient meanspermitting movement of the last mentioned rod independent of the pairsof rods whereby the levers are set for further rocking movement.

a pivotal support for the operating levers,

resilient means connecting the pair of rods with the other rod, andmeans for maintainmg the last mentioned rod against movement of leversforming operatinghandles pair of the rods rigidly to-- whereby thelevers are rocked on their pivot points for completing the stroke of thepiston through the pairs of rigidly connected rods, said resilient meanspermitting movement of the last mentioned rod independent of the pairsof rods whereby the levers are set for further rocking movement, andmeans for retaining the pair ofrigidly connected rods against movementduring certain strokes of the levers. I

5. A pump comprising a piston, a plurality of rods connected with thepiston, a plurality of levers forming operating handlesoidirectreciprocation of the piston for a portion of the stroks of thepiston, means connecting a pair of the rods rigidly together andprovided with fulcrums forming a pivotal support for the operatinglevers, resilient means connecting the pair of rods with the other rod,and means for maintaining the last mentioned rod against movementwhereby the levers are rocked 011 their pivot points for completing thestroke of the piston through the pairs of rigidly connected rods, saidresilient means permitting movement of the last mentioned rodindependent of the pairs of rods whereby the levers are set for furtherrocking movement,

head with meansifor-retainingthe pair; of rigidly connectedjrods againstup ward movement, the

retaining: means for the other rod permitting-downward;movem.ent of.said rod when the levels are rockediii one direction.

: ton aportion of the stroke of the piston,

meansoonnecting a pair,- of the rods rigidly together and provided withfulcrums forming. a. pivotal support: levers, resilientmeans connecting.the pair o fzsrods: with the. other rod, and means'for maintainingthelast mentioned rod against movementwhereby; the levers are rocked ontheirpivotapoints for completing the stroke of: the pistonthrough thepairs of rigidly connected. rods, said resilient meanspermitting..movement of the lasttmentioned rod independent of; the-pairsof. rods whereby the levers are set: for; further rocking movement,means for retaining thepair-otrigidly connected rods against upwardmovement, the retaining meansdior the other rod permittingdownwardmovement of said-rod when the levers-are'rocked in onedirection, and means forimanually: releasing the: retaining meansfronroperative relation with the rods.

7. A pump comprising a cylinder, a. piston, a plurality of'rodsconnectedwith the piston, a plurality of: levers forming handles for 'directreciprocation of the piston for aportion-of the stroke of' said'piston,fulcrums for the levers, and means causing one of the rods to remainstationary when the levers arerock'ed on tliefulcriims-and permittingreciprocation otthe other rods to complete the stroke ofith'e piston, abracket slidahly: mounted on the rods and resilient ineans o-n therodsior connecting the rods togetherand permitting-relative movementbetween certain of the rods.

8; A'pump comprising a cylinder, a piston, a-movalole block, a rodoperating. in the cylinder connected at one end to the-blockandiconnected} at itsother-end to the piston, a cross head, meansconnecting the cross the piston, levers pivotally. mounted onrthe crosshead, and links connecti-ngthebloclcwith the levers.

9. ih' pumpcomprising a cylinder, a piston, a movable block, a-rodoperating in the cylinderconnected at one-end to the block andZconnected 3 at its other end-to the piston, a" cross head, meansconnectingthe cross head" with-thepiston, levers pivotally. mounted" on-the cross head, and. links connecting with the piston, a

operatingfor the operating the block with the levers, means engageable,

with the rod for, maintainingthe rod/against movement in one direction,neansengage: able withthe connecting means between the piston andthecross headfo-r maintaining saidjmeans against movement in one direction.

10. A pump comprising a, cylinder, (t-piston, a movable block,arod'operatiiig in the cylinder connected'at one end] to the block andconnected at its-other, end to tliepiston, a cross head, meansconnecting the cross head with the piston, levers pivotally mounted on.the cross. head, .and.links conin one direction, and means,adaptedtoholdthe maintaining means against operation.

11. A pump comprisinga cylinder, a piston, a plurality ot'rodsCOIlIiQCtBdflVltli the piston, said rods being; provided with notches,spring pressed pawls adapted to engage the notches, a crossfheadrigidly.connected with certain of the rods, leverspivotally mounted on thecross, head," a block rigidly connected with the other i'od, linksconnecting theleversto the block, said'pawls, being adapted to lock thepair ot'rods against reciprocation and permit. reciprocation of theother rod when. the leversare operated, one of the pawls adapted. toenthe other. rod and maintain itagainst reciprocation while permittingthe levers to oscillate the' pair ofrods.

12. A pump v comprising a cylinder, apiston, a plurality ofrods.connectedwitlr the piston, said rods notches, spring pressed pai lsadaptedto, engage the notches, across heath rigidlyconnected withcertain of the rods, levers pivotally mounted on the cross head,,a blockrigidly connected with the OthGI YOCL-dlIlkS connecting the levers tothe block. said pawls being adapted to lock the pair of rods. againstreciprocation and permit. reciprocation of the other rod when the leversare operated, one of the pawls adaptedto engagethe other rod andmaintain it against reciprocation while permittingthelevei's tooscillate the pair of-rods, and manual means adapted tohold the pawls,in an inactive,

position whereby all the rods are simultaneously. reciprocated by thelevers...

VVILLIAM' RICHARD DE MORE.

being, provided with.v

